Copper gaskets

Randy Grein randygrein at
Wed Feb 4 23:02:33 PST 2009

Crankcase pressure is an order of magnitude smaller than the next  
highest, water pressure. Not an issue....
Randy Grein, WMRRA #41

On Feb 4, 2009, at 7:47 AM, Steve Robertson wrote:

> I certainly have heard of people doing this (permatex). I wonder what
> is the most important variable to take into consideration, perfectly  
> flat mating surfaces or max pressure? What about getting "blown out"  
> by
> crankcase pressure?
>> The problem with copper is that it does not spring quite as much as  
>> a steel ridged gasket.  So you can get leakage at the pressure  
>> areas of oil and water passage. IIRC the oil passage is after the  
>> oil jet so is probably pretty low pressure, but the water passage  
>> will be 10-15 psi.   I still want to build a motor using permatex  
>> gasket flange maker as a base gasket and see if it works.

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